JAM Paper® 3 Pocket Letter Booklet Plastic Envelopes have a secure, convenient hook and loop closureThis 12 pack of JAM Paper® Clear 3 Pocket Plastic Letter Booklet Sized Expansion Envelopes with certified Hook & Loop closure contains envelopes that are 9.75in x 13 in size and have a 1-inch expansion. These envelopes have a full-sized pocket that opens on one side and two smaller pockets on the other. These smaller pockets are 5.5 x 725 inches and 5 x 9 inches in size. Store and protect documents, files, notes, index cards, pens, and pencils all in one unit with a pocket perfectly sized for each of them! Each pocket has a certified Hook & Loop closure for secure closing and simple opening. The pliable, yet heavy duty poly plastic material of this envelope will protect your papers and items from bending, ripping, scratches, stains, and other damage. Their clear quality makes them appropriate for any office or school setting and allows you to see your stored items from the outside.